CHAPTER XVII. 

 THE DESIGN OF STEEL DETAILS. 



Introduction. The design of any structure involves the design of the different members 

 and the connections. In this chapter the design of the various steel details will be considered as 

 fully and completely as the limited space permits. The design of the members and details of a 

 steel structure are governed by the specifications for the particular structure. Reference will 

 be made by section and page to the various specifications in this book. 



MEMBERS IN TENSION. Several different methods for making end connections of bars are 

 shown in Fig. I. Loop Bars, (a) Fig. I, are used for lateral bracing on highway bridges, buildings 

 and towers, with turnbuckles or sleeve nuts, to make them adjustable as shown in Tables 92 and 

 94. (All tables numbered with Arabic numerals are in Part II.) Clevises, (b) Fig. i, are used 

 to secure the ends of bars used as lateral bracing on highway bridges and on buildings. The pin 

 may be either a cotter pin as shown in Table 96, or a bridge pin as shown in Table 95. Ordinary 

 eye-bars, (c) Fig. I, are used principally for lower chords and main ties on bridges. Data for eye- 

 bars are given in Table 91. Counters are made of adjustable eye-bars as shown in Table 91. 

 Bottom lateral plates or skew-backs, (d) Fig. i , are used to secure the ends of bottom lateral rods 



(a) Loop. 



(b) Clevis. 



(c)Eye 



(e) TopLateralor U-PJate. 



(g)Anqfe 



V> 



(d) Bottom Lateral Plate 



or Skew back. (F) Cooper Hitch. (h) Beveled Washer, Cast Iron. 



FIG. i. DETAILS OF TENSION MEMBERS. 



of highway bridges and are shown in Table 121. Top lateral plates or U-plates, (e) Fig. i, are 

 used for top lateral connections on highway bridges and for lateral bracing on buildings, highway 

 bridges and towers, see Table 122. The Cooper hitch has the same uses as the top lateral plate. 

 The angle as shown in (g) Fig. i is used for end connections for light bars in buildings and towers, 

 see Table 120. Cast iron beveled washers, (K) Fig. i, are used for end connections of diagonal 

 bracing, see Table 120. The ends of bars should be upset as shown in Tables 89 and 90, so that 

 the strength in the threads will be greater than the strength of the main body of the bar. The 

 dimensions of tie rods for beams are shown in Table 105. 



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